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8b029db859
Implement support for CONFIG_SERIAL_MULTI into clps7111 serial driver. This driver was so far only usable directly, but this patch also adds support for the multi method. This allows using more than one serial driver alongside the clps7111 driver. Also, add a weak implementation of default_serial_console() returning this driver. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Marek Vasut <marek.vasut@gmail.com> Cc: Tom Rini <trini@ti.com>
174 lines
3.6 KiB
C
174 lines
3.6 KiB
C
/*
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* (C) Copyright 2002-2004
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* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Alex Zuepke <azu@sysgo.de>
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*
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* Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <common.h>
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#include <clps7111.h>
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DECLARE_GLOBAL_DATA_PTR;
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static void clps7111_serial_setbrg(void)
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{
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unsigned int reg = 0;
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switch (gd->baudrate) {
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case 1200: reg = 191; break;
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case 9600: reg = 23; break;
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case 19200: reg = 11; break;
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case 38400: reg = 5; break;
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case 57600: reg = 3; break;
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case 115200: reg = 1; break;
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default: hang (); break;
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}
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/* init serial serial 1,2 */
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IO_SYSCON1 = SYSCON1_UART1EN;
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IO_SYSCON2 = SYSCON2_UART2EN;
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reg |= UBRLCR_WRDLEN8;
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IO_UBRLCR1 = reg;
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IO_UBRLCR2 = reg;
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}
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/*
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* Initialise the serial port with the given baudrate. The settings
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* are always 8 data bits, no parity, 1 stop bit, no start bits.
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*
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*/
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static int clps7111_serial_init(void)
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{
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serial_setbrg ();
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return (0);
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}
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/*
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* Output a single byte to the serial port.
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*/
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static void clps7111_serial_putc(const char c)
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{
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int tmo;
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/* If \n, also do \r */
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if (c == '\n')
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serial_putc ('\r');
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tmo = get_timer (0) + 1 * CONFIG_SYS_HZ;
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while (IO_SYSFLG1 & SYSFLG1_UTXFF)
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if (get_timer (0) > tmo)
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break;
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IO_UARTDR1 = c;
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}
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/*
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* Read a single byte from the serial port. Returns 1 on success, 0
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* otherwise. When the function is succesfull, the character read is
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* written into its argument c.
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*/
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static int clps7111_serial_tstc(void)
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{
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return !(IO_SYSFLG1 & SYSFLG1_URXFE);
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}
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/*
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* Read a single byte from the serial port. Returns 1 on success, 0
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* otherwise. When the function is succesfull, the character read is
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* written into its argument c.
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*/
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static int clps7111_serial_getc(void)
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{
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while (IO_SYSFLG1 & SYSFLG1_URXFE);
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return IO_UARTDR1 & 0xff;
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}
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static void clps7111_serial_puts(const char *s)
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{
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while (*s) {
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serial_putc (*s++);
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}
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}
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#ifdef CONFIG_SERIAL_MULTI
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static struct serial_device clps7111_serial_drv = {
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.name = "clps7111_serial",
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.start = clps7111_serial_init,
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.stop = NULL,
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.setbrg = clps7111_serial_setbrg,
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.putc = clps7111_serial_putc,
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.puts = clps7111_serial_puts,
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.getc = clps7111_serial_getc,
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.tstc = clps7111_serial_tstc,
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};
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void clps7111_serial_initialize(void)
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{
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serial_register(&clps7111_serial_drv);
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}
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__weak struct serial_device *default_serial_console(void)
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{
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return &clps7111_serial_drv;
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}
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#else
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int serial_init(void)
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{
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return clps7111_serial_init();
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}
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void serial_setbrg(void)
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{
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clps7111_serial_setbrg();
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}
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void serial_putc(const char c)
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{
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clps7111_serial_putc(c);
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}
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void serial_puts(const char *s)
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{
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clps7111_serial_puts(s);
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}
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int serial_getc(void)
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{
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return clps7111_serial_getc();
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}
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int serial_tstc(void)
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{
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return clps7111_serial_tstc();
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}
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#endif
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